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  1. Minecraft: Java Edition
  2. MC-35832

Hopper: java.lang.IllegalStateException: failed to create a child event loop

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    • Icon: Bug Bug
    • Resolution: Duplicate
    • None
    • Minecraft 13w42a
    • None
    • Unconfirmed

      This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-390313/

      Crash:

      java.lang.IllegalStateException: failed to create a child event loop
      	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61)
      	at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
      	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
      	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
      	at mr.<init>(SourceFile:36)
      	at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)
      	at bsb.<init>(SourceFile:38)
      	at ayw.a(SourceFile:1579)
      	at bbx.e(SourceFile:162)
      	at bby.a(SourceFile:214)
      	at bar.a(SourceFile:186)
      	at bbx.a(SourceFile:187)
      

      The following is the first clean report made public about this crash:

      ---- Minecraft Crash Report ----
      // On the bright side, I bought you a teddy bear!
      
      Time: 17.10.13 22:15
      Description: Rendering screen
      
      java.lang.IllegalStateException: failed to create a child event loop
      	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61)
      	at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
      	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
      	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
      	at mr.<init>(SourceFile:36)
      	at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)
      	at bsb.<init>(SourceFile:38)
      	at ayw.a(SourceFile:1579)
      	at bbx.e(SourceFile:162)
      	at bby.a(SourceFile:214)
      	at bar.a(SourceFile:186)
      	at bbx.a(SourceFile:187)
      	at blc.b(SourceFile:850)
      	at ayw.ac(SourceFile:776)
      	at ayw.e(SourceFile:700)
      	at net.minecraft.client.main.Main.main(SourceFile:103)
      Caused by: io.netty.channel.ChannelException: failed to open a new selector
      	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:128)
      	at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:120)
      	at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:87)
      	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:57)
      	... 15 more
      Caused by: java.io.IOException: Unable to establish loopback connection
      	at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
      	at sun.nio.ch.PipeImpl$Initializer.run(Unknown Source)
      	at java.security.AccessController.doPrivileged(Native Method)
      	at sun.nio.ch.PipeImpl.<init>(Unknown Source)
      	at sun.nio.ch.SelectorProviderImpl.openPipe(Unknown Source)
      	at java.nio.channels.Pipe.open(Unknown Source)
      	at sun.nio.ch.WindowsSelectorImpl.<init>(Unknown Source)
      	at sun.nio.ch.WindowsSelectorProvider.openSelector(Unknown Source)
      	at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:126)
      	... 18 more
      Caused by: java.net.ConnectException: Connection refused: connect
      	at sun.nio.ch.Net.connect0(Native Method)
      	at sun.nio.ch.Net.connect(Unknown Source)
      	at sun.nio.ch.Net.connect(Unknown Source)
      	at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
      	at java.nio.channels.SocketChannel.open(Unknown Source)
      	... 27 more
      
      
      A detailed walkthrough of the error, its code path and all known details is as follows:
      ---------------------------------------------------------------------------------------
      
      -- Head --
      Stacktrace:
      	at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:61)
      	at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:49)
      	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:61)
      	at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:52)
      	at mr.<init>(SourceFile:36)
      	at net.minecraft.server.MinecraftServer.<init>(SourceFile:114)
      	at bsb.<init>(SourceFile:38)
      	at ayw.a(SourceFile:1579)
      	at bbx.e(SourceFile:162)
      	at bby.a(SourceFile:214)
      	at bar.a(SourceFile:186)
      	at bbx.a(SourceFile:187)
      
      -- Screen render details --
      Details:
      	Screen name: bsy
      	Mouse location: Scaled: (175, 52). Absolute: (526, 680)
      	Screen size: Scaled: (480, 280). Absolute: (1440, 838). Scale factor of 3
      Stacktrace:
      	at blc.b(SourceFile:850)
      	at ayw.ac(SourceFile:776)
      	at ayw.e(SourceFile:700)
      	at net.minecraft.client.main.Main.main(SourceFile:103)
      
      -- System Details --
      Details:
      	Minecraft Version: 13w42a
      	Operating System: Windows 7 (x86) version 6.1
      	Java Version: 1.7.0_25, Oracle Corporation
      	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
      	Memory: 48027728 bytes (45 MB) / 83062784 bytes (79 MB) up to 518979584 bytes (494 MB)
      	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
      	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
      	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
      	Launched Version: 13w42a
      	LWJGL: 2.9.0
      	OpenGL: GeForce GTX 280/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
      	Is Modded: Probably not. Jar signature remains and client brand is untouched.
      	Type: Client (map_client.txt)
      	Resource Packs: []
      	Current Language: Deutsch (Deutschland)
      	Profiler Position: N/A (disabled)
      	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
      	Anisotropic Filtering: Off (1)
      

      You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-390313/18853715/

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              Created:
              Updated:
              Resolved: